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(No Model.)

0. D. WALLACE.

ETYPE WRITING MACHINE. I No. 474,981. Patented May 1?; 1892.

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UNITED STATES PATENT @FFICE.

'YO ST \VRITING MACHINE COMPANY, OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 474,981, dated May 17,1892.

Application filed May 15, 1889. erial No, 310,802. (No model.)

To all whom it may concern.-

Be it known that I, CASPER D. WALLACE, a citizen of the United States,and a resident of Bridgeport, in the county of Fairfield and 5 State ofConnecticut, have invented certain new and useful Improvements inType-VVriting Machines, of which the following is a specification.Myimprovements in type-writing machines relate more particularly to thesignaling mechanism, and have for their main objects to provide a simpleand eflicient 'means for giving an audible signal or alarm when thepaper-carriage has arrived at any predeteri mined point in its path oftravel; and to this end my invention consists in the combinations ofdevices hereinafter more fully described, and particularly pointed outin the appended claims, In the accompanying drawings, Figure 1 is a rearelevation of a portion of a type-writing machine embodyingmyimprovernents. Fig.

2 is a side or face view of the signaling mechanism detached. Fig. 3 is'a vertical section taken at the linear acof Fig. 4. Fig.4 is a verticalsection taken at the line y y of Fig. 2.-

Fig. 5 is a face view of the driving-drum.

Fig. 6 is a vertical section taken at the line 2 z of Fig. 5. Fig. 7 isa side detail view of 0 the supporting-bracket, the bell, the hammer,

and the hammer-supporting and actuatingplates. Fig. 8 is a top View ofthe same.

Fig. 9 is a perspective view of the hammersupporting plate. Fig. 10 is asimilar view of 3 5 the arm or lever which actuates the hammersupportingplate or arm. Fig. 11 is a perspective view of the retaining means forthe bell-trip adjusting-spindle. Fig. 12 is a similar view of the samewith the spindle in po- 0 sition; and Fig. 13 is an enlarged perspectiveView of the bell-hammer and its supporting and actuating devices, andshowing also a portion of the supporting-bracket.

In the several views the same part will be 7 5 found designated by thesame numeral of reference.

1 represents the usual type-ring or top plate of a type-writing machine;2 and 3, the carriage guided-ails; 4, a yoke connecting the carriagewith the guide-rails; 5, a feed-rack attached to the yoke, and 6 acylindrical platen mounted to travel with the carriage, all in about theordinary manner. Preferably attached to the under side of the top plateis a bracket 7 for supporting the carriage-driving mechanism. 1

8 represents a drum having a groove 9 in its periphery and a central hub10, which is mounted to turn on a stud or arbor l1, shouldered andthreaded at its outer end and niade fast to a toothed wheel 12 by aclamping-nut 13. To the inner end of the stud or arbor 11 is attachedone end of a volute or clock-spring 14., whose other end is connected tothe drum 8. Engaging with the toothed'wheel 12 is a gear or cog 15,provided with a button or finger-piece 16 for convenience of rotation.The spring may be wound up by turning the gears and the desired tensionor power obtained. A spring-pressed pawl or dog 17 may be provided forpreventing accidental unwinding of the spring 14. This pawl or dog maybe supplied with a finger-piece 18 for enabling the disengagement of thepawl when it is desired to diminish'the power of the spring 14:. A cord,chain, or other flexible connection 19 is attached at one end to thedrum 8 and at its other end to the paper-carriage, preferably at aboutthe locality marked 20.

The spring-drum 8 is adapted to propel or pull the carriage to the leftof the machine. The usually-employed feed-dogs which co-operate withtherack 5 to effect a step-by-step feed of the carriage are not shown.When the spring-drum has drawn the carriage to the left the desired orthe entire distance, the carriage is returned to the right by theoperator in the usual manner, at which time the spring 14 isautomatically rewound by the rotation of its drum under the action ofthe unwinding cord or flexible connection 19, thus renewing orreproviding the power for again effecting the propulsion ot' thecarriage. As the carriage during the writing'travels step by step towardthe left of the machine, the 5 flexible connection wraps about theperiphery of the drum and the driving-spring 14 therein graduallyunwinds. A pulley 21 is provided to change the direction of the flexibleconnection.

22 is an arm or support screwed at 23 to the bracket 7 and provided witha gong 24:. At

the free end ofthe arm is pivoted a small plate 25, carrying a hammer26, adapted to strike the gong and provided with a lug 27, which isadapted to vibrate between two stops 28 and 29, formed or provided inthe arm 22. To the inner end of the plate is pivoted at. 30 an arm orlever 31 foractuating the plate 535 and the hammer 26. The lever 31 isformed or provided with a finger 32, overlapping; the edge of the plate25, and with a projection 33, extending in an opposite direction andadapted to be engaged by a trip-pin 34:, secured to a disk 35, fitted toturn in a bevel or groove 36, formed in the spring-drum 8. The disk 35is held in position to travel or turn with the drum by spring fingers orclasps 37 and is provided centrally with a square hole to receive thesquare end 38 of a spindle 39, which passes through the stud or arborlland is provided at its outer end with a head 40 and a groove {11,intowhich takes a spring 42 on the nut l3 for maintaining the spindle inoperative position.

The disk or trip-pin carrier may be turned by the spindle against thefriction of the drum and the spring fingers or clasps; but the latterare arranged to press hard enough against the disk to prevent anyturning or shifting of the latter accidentally or by reason of thecontact of the trip-pin with the projection 33. v

The drum 8 is constructed and arranged to make one revolution while thecarriage travels its full distance in either direction, right or left.'lhetrip-pin traveling with the drum also makes one revolution while thecarriage travels from right to left, or vice versa. The trip-pin may beadjusted or shifted to different positions, so that the alarm or signalmay be given at any point between the extremes of travel of thecarriage.

If it. be desired, for instance, to have the alarm sounded when thecarriage has traveled to the left about half its full distance, (or,say, 35 on the usually-employed front scale,) the carriage is moveduntil about the center of the platen (lengthwise) stands midway of thetrack of the carriage, (or until the pointer on the carriage standsopposite 35 on the machine-scale.) The trip-pin, by means of the spindleand disk, is then rotated by hand in the direction of the arrow a atFig. 2 until the bell rings. Thereafter every time the carriage arrivesat the middle of its path or stroke in moving to the left (or every timethe pointer reaches 35 the alarm will be rung. If the pointer be set aton the scale and the trip-pin be adjusted by hand to actuate the gongmechanism, the alarm will be sounded thereafter whenever the pointerarrives at 65 in the movement of the carriage from right to left. Inthis manner the trip-pin may'be adjusted to signal the operator at anydesired locality.

It will be understood, of course, that the trip-pin is rotatedindependentlyof the drum in making adjustments, and that it travels withit during the feed of the carriage under the influence of thedriving-spring.

When the carriage is pulled to the right, the drum turns in thedirection of the arrow b at Fig. 2, the cord is unwound, and the springis wound. As the drum thus turns, the trip-pin 3i strikes the upper sideof the projection 33, vibrates the lever 31, and passes by it, thelatter returning to normal position by gravity immediately the pin andthe projection part company. At this time the gong is not sounded. Whenthe carriage is being fed to the left, the drum turns in a direction thereverse of that indicated by the arrow 1), and the cord is Woundthereupon. As the drum turns thus, the trip-pin engages with theunderside of the projection 33 and vibrates the lever 31 in thedirection of the arrow at Fig. 13, the finger 32 at the same timecarrying down the arm 25 against the tension of 'a. spring 43 andraising the bell hammer. As soon as the trip-pin passes beyond theprojection 33 the spring 43 operates to return the arm 25 and the lever31 to their initial positions, and in so doing the hammer is caused tostrike the gong. Normally the parts stand in the position illus tratedat Fig. 13 with the lug 27 in contactv with the stop 28. The stop 29 maybe dispensed with, if desired.

Numerous changes in detail construction may be made without departingfrom the spirit of my improvements, and so far as some of the featuresare concerned other means than those shown and described may be employedfor feeding or driving the carriage.

What I-claim as new, and desire to secure by Letters Patent, is-

1. The combination,witha rotatorybell-trip, of a bell, a pivotedarmcarrying a bell-ham mer, and a lever pivoted to said arm, adapted tobe actuated by the bell-trip and in turn to actuate the pivotedbell-hammer arm.

2. The combination,witharotatorybell-trip, of a bell, a pivoted armcarrying a bell-hammer, a lever pivoted to said arm, and a spring forreturning the parts to their normal positions.

3. The combination,witharotatorybell-trip, of a bell, a pivoted armhavingabell-hammer and a lug, a stop 28 for said lug, and areturning-spring.

4. The combination,witharotatory bell-trip, of a bell, a pivoted arm, abell-hammer, and a lever pivoted to and parallel with said arm andprovided with a finger for moving said arm, and a projection forengagement with said bell-trip.

5. Thecombinatiomwith arotatorybell-trip, of a bell, an arm pivoted atone end and carrying a bell-hammer, and a lever pivoted at the otherfree end of said arm and constructed to carry the arm when the bell-triprotates in one direction and to vibrate independently thereof when thebell-trip rotates in the opposite direction.

6. The eombinatiomwitharotatory bell-trip,

of a bell, a bracket, a bell-hammer arm pivoted to said bracket, aleverpivoted or fulcrnmed 011 said arm, a finger engaging the latter, aprojection in the path of the belltrip, a spring, and a stop or abutment28.

7. The combination of the paper-carriage, a

- spring-drum, a driving-belt connected at one end to the paper-carriageand at the other end to the spring-dru m, a hollow stud or-arbor forsaid spring-drum to turn upon, a toothed wheel secured to said stud orarbor, a pinion or cog for turning said toothed wheel and the stud orarbor and winding said spring, a disk fitted upon said spring-drum,having a-belltrip adapted to turn with said drum during the movements ofthe carriage, a spindle having at its outer end a hand-piece passingthrough said stud or arbor and engaging said disk in a manner such thatthe bell-trip thereon may be adjusted to different positionsindependently of the rotation of said spring-drum, and a bell mechanismadapted to be actuated by said bell-trip.

8. The combination of a paper-carriage, a spring-drum, a flexibleconnection between the two, a circular disk frictionally attached to theside of said drum, a spindle passing axially through said drum andengaging said disk and provided with a knob, a bell-trip on said disk,-and a bell mechanis 9. The combination of a paper-carriage, aspring-drum, a flexible connection between the two, a circular diskfrictionally attached to the side of. said drum, a spindle passingaxially through said drum and engaging said disk and provided with aknob, a bell-trip on said disk, a bell, a bell-hammer, an arm pivoted atone end and carrying said bell-hammer, a lever pivoted at the oppositefree end of said arm and provided with a finger to move the bell-hammerarm, and a projection to be encountered by the bell-trip.

10. The combination of a paper-carriage, a

driving-belt, a spring-drum, a circnlardisk fitted to the side of saiddrum, a series of fingers for holding said disk frictionally to saiddrum, a spindle for turning said disk independently of said drum, abell-trip on said disk, and a bell mechanism.

11. The combination of a paper-carriage, a driving-belt, a pulley, aspring-drumarranged at right angles to the travel of the carriage and atthe side of the machine, a depending bracket for supporting said drum, adisk fitted to said drum, a spindle passing through the drum for turningsaid disk independently of the drum and having a knob at the side of themachine, a bell-trip on said disk, and a bell mechanism.

12. The combination of a paper-carriage, a driving-belt, a pulley, aspring-drum arranged at right angles to the travel of the carriage andat the side of the machine, a depending bracket for supporting saiddrum, a disk fitted to said drum, a spindle passing through the drum forturning said disk independently of the drum and havinga knob at the sideof the machine, agbell-trip on said disk, and a rigid supporting-armextending from said bracket and having a stop 28, a bell mounted on saidsupporting-arm, an arm carrying a hammer, pivoted at one end to saidsupporting-arm and provided with a lug,a lever pivoted to the 0ppositefree end of said pivoted arm and havin g 'a finger and a projection, anda returningspring.

13. The combination, with a rotatory belltrip, of a supporting-armhaving a stop 28, a bell, a pivoted arm 25, carrying a bell-hammer andhaving a lug, a lever pivoted to the arm 25 eccentrically of its pivotand having an overlapping finger to move the pivoted arm 25, and aprojection to be encountered bytthebell-trip.

Signed at Bridgeport, in the countyof Fairfield and State ofConnecticut, this 10th day of May, A. D. 1889 CASPER D. WALLACE.

